What does AREL stand for?

What does AREL stand f开发者_开发技巧or? I couldn't find what's the meaning of this acronym anywhere.

---

This? https://github.com/nkallen/arel "A RELational algebra"

See also: http://magicscalingsprinkles.wordpress.com/2010/01/28/why-i-wrote-arel/ http://web.archive.org/web/20120718093140/http://magicscalingsprinkles.wordpress.com/2010/01/28/why-i-wrote-arel/

---

Or, perhaps "Active Relation": http://edgeguides.rubyonrails.org/3_0_release_notes.html